新疆昭苏蚁包草地重建对群落结构影响的初步研究

The Primary Study on Community Structure Response after Reconstructing Ant Stack Grassland in Zhaosu Xinjiang

通过农艺措施对蚁包草地实施重建,地上生物量显著提高(P﹤0.01),两年鲜草平均产量3194g/㎡,是对照的2.61倍,优良牧草产量占总产的97.46%。最高地上生物量到来的时间比对照提前15d左右。草地重建后,物种丰富度、物种多样性显著下降(P﹤0.05),物种均匀性虽有所下降,但变化不大。随着建设时间的后移,建设草地物种总数有增加趋势,应加强管理,合理利用。因此,在水热条件充足,地势平坦区域,实施退化草地重建是促进草地资源建设与利用的有效措施。

After reconstructing grassland with Ant stack by agriculture measure, the overground biomass advanced distinctly （P 〈 0.01）, the average yeild is up to 3194g/m^2, the 2.61 times to comparison grassland, and the yield of eximious forage is 97.46% of total yield. The fastigium of overground biomass is ahead about 15 days contrastively to comparison grassland. After reconstructing, community species richness and diversity decreased distinctly （P 〈 0.05）, and evenness decreased little. AS the reconstructing period increasing the species has an increasing tend. We must enhance management and utilize reasonably. So reconstructing degraded grassland is an effective measure to advanced grassland construct and utilization in the evenness area that has abundant water and heat.